Novak Djokovic, Coco Gauff roll to Australian Open's 4th round. Naomi Osaka retires due to injury and Jessica Pegula was upset in the third round.

While there have been plenty of surprises in the men’s bracket so far, most of the top women have progressed through the draw without an issue.

Coco Gauff and two-time defending champion Aryna Sabalenka have moved closer to another semifinal showdown at the Australian Open.